New Revised Standard Version
When they moved, I heard the sound of their wings like the sound of mighty waters, like the thunder of the Almighty, a sound of tumult like the sound of an army; when they stopped, they let down their wings.

Contemporary English Version
Whenever the creatures flew, their wings roared like an ocean or a large army or even the voice of God All-Powerful. And whenever the creatures stopped, they folded their wings against their bodies.

New American Bible
Then I heard the sound of their wings, like the roaring of mighty waters, like the voice of the Almighty. When they moved, the sound of the tumult was like the din of an army. And when they stood still, they lowered their wings.

Douay-Rheims Bible
And I heard the noise of their wings, like the noise of many waters, as it were the voice of the most high God: when they walked, it was like the voice of a multitude, like the noise of an army, and when they stood, their wings were let down.

And I heard the noise of their wings, like the noise of many waters, as it were the voice of the most high God: when they walked, it was like the voice of a multitude, like the noise of an army, and when they stood, their wings were let down.

like

Ezekiel 43:2 And behold the glory of the God of Israel came in by the way of the east: and his voice was like the noise of many waters, and the earth shone with his majesty.

Revelation 1:15 And his feet like unto fine brass, as in a burning furnace. And his voice as the sound of many waters.

Revelation 19:6 And I heard as it were the voice of a great multitude, and as the voice of many waters, and as the voice of great thunders, saying: Alleluia: for the Lord our God, the Almighty, hath reigned.

as the voice

Ezekiel 10:5 And the sound of the wings of the cherubims was heard even to the outward court as the voice of God Almighty speaking.

Job 37:2,4,5 Hear ye attentively the terror of his voice, and the sound that cometh out of his mouth. . . .

Psalm 18:13 And the Lord thundered from heaven, and the Highest gave his voice: hail and coals of fire.

Psalm 29:3-9 The voice of the Lord is upon the waters; the God of majesty hath thundered, The Lord is upon many waters. . . .

Psalm 68:33 Who mounteth above the heaven of heavens, to the east. Behold he will give to his voice the voice of power:

as the noise

Daniel 10:6 And his body was like the chrysolite, and his face as the appearance of lightning, and his eyes as a burning lamp: and his arms, and all downward even to the feet, like in appearance to glittering brass: and the voice of his word like the voice of a multitude.

2 Kings 7:6 For the Lord had made them hear, in the camp of Syria, the noise of chariots, and of horses, and of a very great army: and they said one to another: Behold, the king of Israel hath hired against us the kings of the Hethites, and of the Egyptians; and they are come upon us.